Form for concrete



sept. 18, 1928. 1,684,614

F. M BARTON FORM FOR {IONCRETE Filed Oct. 25. 1926 2 Sheets-Sheet l A" Aj,

sept. 1s, 192s. I 1,684,614

E. M. BARTON FORM FOR CONCRETE Filed Oct. 25,I 1926 .2 Sheets-Sheet 2Patented Sept. 18, 192.8. n '-l' UNITEDY STATES FRANCIS SYSTEM, 0FCHICAGO, ILLINOIS, A CORPORATION 0E ILLINOIS.y

. FORM FOR CONCRETE.

Application mela october 25, 1926. serial No. 143,873.

The invention relates to hollow sheet metal forms for concrete floorconstructions.

One object of the invention is to provide an improved form of this typewhich is comn posed of units which maybe nested in shipment andassembled at the place of installation, and which, when assembled, willbe rigid. Another object of the invention is to provide an improved formof this type in which the unit-sare formed of continuously corrugatedsheets and in which the corners are stiffened or reinforced by integralformations.l Another object of the invention is to provide an improvedend plate for the forni of corrugated metal. Another object is toprovide an improved interlocking connection between the top and thesides of the form.

The invention consists in the several novel lfeatures hereinafter setforth and more particularly defined by claims at the conclusion hereof.

- In the drawings: Fig. 1 is a vertical section through a floorembodying the invention. Fig. 2 is a section of the floor on line 2 2 ofFig. 1. Fig. 3 is a section on an enenlarged scale talrenon' line 3 8 ofFig. 2. Fig. 4 is a section on an enlarged scale taken on line L -l ofFig. 1. Fig. 5 is a perspective of the form, the cover being separatedfor illustrative purposes. Figs. 6 and 7 are sectional views on anenlargedv scale through one of the upper corners of the form. Fig. 8 isa perspective of a portion of one of the upper corners of the form.AFig. 9 is a detail section, showing the 'formation at the lower cornersof the form.

The invention is exemplified in a concrete floor construction composedmainly of the beams 6 and a slab V7 kextending over and uniting thebeams to form an integral stucture. The beams are usually reinforced byrods 8, extending lengthwise thereof and upwardly to a point in oradjacent the slabs. The formswhich are disposed between the beamsare'madefof sheet. metal and comprise upper and lower members which,when secured together, vform a hollow rigid box-like structure. Each ofthe upper and lower members is formed of a sheet of metal corrugatedthroughout its entire area. The lower member of each form comprises abot tom 9 and integral upwardly extending and flared side walls 10 and11. The corruga tions in the bottom are parallel and extend between thesides `10 and 11, thermetal being formed of a continuous series ofalternating and reversely curved crowns 9, 9b which are continuedvertically in the side walls 10 and 11 to the upper margins thereof. Inorder to adapt the bottom to serve as a base or lath which is adapted toretain plaster 13, the transversely extending portions between thecrowns are sheared, as at 9c, and the sheared tongues 9d are bentoutwardly to form claws in the grooves in 'the outer face of the sheet.The claws 9d on one side of each groove are staggered with respect tothe claws on the opposite side of the groove, so that each claw willcoact with a corrugatedv uncut portion' of the sheet in retaining theplaster. rln forming the lower vmember'by` bending the sides relativelyto the bottom, the metall in the grooves at the corners" is deflectedoutwardly or downwardly, as at- 9e, to permit the corrugated sheet to bebent without rupture, as more fully set forth in an application filed byme of even date herewith,A Serial Number 148,062, to which reference maybe had for a more detailed description of the method employed inproducing the deforma-py tion. As a' result ofr thus deflecting the.,

metal at the base of the grooves, the corner' i 1,684,614, PATENTOFFICE.

M. BARTON, OF CHICAGO, ILLINOIS, ASSIGNOR TO BARTON SPIDER WEB isrendered exceptionally rigid, andA pockets y QE are produced which willcause the plaster' to be effectively keyed around the' lower corners ofthe form.4 The walls 10 and 1.1 are Hai-ed upwardly so Ythat theconcrete beam will be thicker adjacent its lower end than at its upperend, so the maximum will be disposed at the lower portion of the beamwhere the greatest stresses occur and the minimum adjacent the top ofthe beam. This extends the upper corners of the form to displaceconcrete which has little supporting value.

Each top member of the form consists of a sheet metal plate 17 which iscorrugated from side to side and parallelly to the corrugatio-ns in thebottom 9 of the form. The side margin of each plate 17 is bentdownwardly to form 'a flange 17l adapted to lap the' upper portion ofthe sides 10 fand 11.l The corrugations in theftop are continued to theends of said flanges, so that they will be corrugated conformably to thecorrugations in the sides 10 and 11. The flanges are integral with thecorrugated plate 17 and are formed by bending the plate in accordancewith the method set forth in the aforesaid application No; 143,062, andso as to'leave the deformed portions-17b across the corners of thegrooves in the outer faces of the sheet to render the corner rigid. Thecrowns at the inner faces of the flanges 17a are sheared, as at 17, andbent inwardly, as at 17d,'to form tongues which are adapted to lap theinner faces of the upper margins of the sides 10 and l1, so that thesides will be laterally locked between the flanges 17a and saidtongues.` These top members form a support for the floor slab 7 and alsoserve as a connection between the upper `ends of thesides ifi 10 and 11ofthe lower member of the form so they will not spread.

Each form is usuallybuilt up of a plu` rality of' sections,` eachcomprising upper and lower members, the `contiguous ends of' which lapor extend into one another so that the form may be extended the full"length ofthe beam or of the spaces desired between the beams and builtup of small units which can be conveniently transported andl handled.The upper flare on the sides of the lower members permits them totelescope into one another. Y Y

The endof each form is usually closed by al sheet metal plate 22 'whichis corrugated horizontally, so that it ywill render the ends of the formcomparativel stiff. This. plate is formed of a continuous y corrugatedsheet andhas its margin sinuously sheared, Vas at 22, so 4.that itsedges will conform throughout its length to the inner faces of Ythealigned grooves inthe inner faces of the bottom and sides 10 and 11. Theupper and lower margins of the plate 22 'are extended into grooves inthe top and bottom of the form, so that it will bev locked on all foursides to the form when it is assembled therein.` This formation effectsa fit between the plate and the member which forms a closure and rendersunnecessary any special formation or die work on the plates for aninterlock between allmargins of the plates and the top, sides and bottomof the form.

In practice, the formmembers ,are-fab-V ricated at shops and shipped instacks `to i. the place where they are to be installed.

The flared formation of the bottom members permits them to be telescopedor closely stacked for convenience in transportation or storage.V At theplace of installation, a suitable staging is'erected to support theforms.Y

hollow in the concrete. After the forms are i in place, the concreteispoured between,

around and over-'the forms to form an integral beam and floorconstruction, aswell1 understood in the art. Next, the plaster 1sapplied directly to the bottom of the forms* and the beams, the claws 9dserving to retain the plaster. 1

The invention exemplifies a form for a concreteV floor construction inwhich the members are formed of continuously corrugated sheets with thecorners deformed to;

render "them rigid and 'so vthe "metal will not be ruptured where it`isYbent-to form `the i corners; also a form in which a completelyAcorrugated Yend sheet is interlocked'y with* the top and bottom lmembersto `stiften the end of the form.

The inventionis not to `be understood as l restricted to the details setforth, since these may be modified within Vthe `scope of the appendedclaims, without departing from the spirit and scope `ofthe invention.

Having thus described the inventiomwhat I claim as new and desire tosecure by Letters' Patent, is: i i

1.` A sheet metal form foir concreteeomprising a bottom` and sideshaving a con` tinuous series of eorrugations extending upr wardly in andtothe upperedges of the sides, a cover consisting of a sheetofmetal'gprm vided with marginal flanges having a vc011- tinuous seriesof corrugationsconforming to and `fitting the corrugations in and'lapping the sides. '4 i Y 2. A form-for conerete'comprising a singlesheetof metal Tbent to` form allbottomisand sides provided withacont'imuous series vofV corrugations extendingu wardly 4in and to theupper edges `of Vthesit es,a cover'consist lng of a sheet `of lmetalprovided with mar` ginal flanges to lap the `outerfaces f the? sides`and having a` series ofcorrugations conforming to and fittingthecorrugations of y the sides.

A form for concrete cmpi'isingasingle sheet of metal bentzto` form abottom and sides and `having Y a continuousy series of rcrrugationsextendingwacross the "bottom Vand upwardly `in thesides to the upperedges. thereof, a cover consistingiof' a shtyof metal provided withmarginal flangestolap the sidesfhavmga continuousseriesof cora rugationsextending continuously `across it and downwardly in theflanges totheirflower` edgesand conforming to and fitting ,theeorf rugations ofthesides i 4. A sheet metal form for concrete comi-V` Y' prisinga`bottom andsides-having acontinuous series of oorrugations` ektendin`wardly` in,` and 'to the up erledges o the sides. a :cover consisti'ngoasheetof metal provided with marginalangesr ihaving av continuous seriesof corrugatins conforming to and fittingnthe; eorrugations in andflaplav i ping the outer face of the sides, and means to secure thesides against inward deflection.

5. A sheet metal form for concrete comprising a bottom and sides havinga continuous series of corrugations extending upwardly in and to theupper edges of the sides, a cover consisting ofa sheet of metal providedwith marginal flanges having a continuous series of corrugationsconforming to and fitting the corrugations in and lapping the outer`faces of the `sides and means integral with the lianges and lapping theinner faces of the sides respectively to sec-ure said sides againstinward deflection.

6. A sheet metal form for concrete comprising` a bottom and sidesprovided with a continuous series of corrugations extending upwardly toytheir upper edges, and a cover consistng of a correspondingly cor'-rugated sheet having flanges bent to tit and lap one face of thecorrugated sides respectively and having integral tongues to lap theother faces of the sides.

7. A form for concrete comprisirng` a single sheet of metal bent to forma bottom and sides, with a continuous series of corrugations extendingacross the bottom and upn wardly in the sides to their upper edges, and

a cover consisting of a correspondingly corrugated sheet having flangesbent to vlit and lap one face of the corrugated sides respectively andhaving integral tongues to lapthe other faces of the sides.

8. A sheet metal form for concrete. con.- prising a bottom and sidesprovided with a continuous series of corrugations extending to theirupper edges, and a cover consisting of a correspondingly corrugatedsheet having flanges bent to fit and lap one face of the corrugatedsides and having integral tongues in the crowns of the corrugations atthe inner faces of the flange to lap the other faces of the sides.

9. A sheet metal form for concrete comprising a bottom and sides andhaving7 a series of corrugations extending across the for May, 192e.

bottom and throughout the sides, and an end plate continuouslycorrugated to its ends and having its ends curved transversely of thecorrugations to fit in the grooves of the corrugations in the sides.

10. A sheet metal form for concrete comprising a bottom and sides andhaving a continuous series of corrugations extending across the bottomand throughout the sides and a correspondingly corrugated cover provided with flanges to top the. sides, and an end plate continuouslycorrugated to its ends and having its ends curved to fit in the groovesof the corrugated sides and having top and bottom edges litting in thegrooves of the top and bottom respectively.

1l. A form for concrete comprising ay single sheet of metal bent to forma bottom and sides and having a continuous series of corrugationsextending across the bottom and throughout the sides, the bottom beingprovided with outstruck claws disposed in wardly of the plane of thebottom crowns 0f the corrugations.v

l2. A form for concrete comprising a single sheet of metal bent to forma bottom and sides and having a continuous series of corrugationsextending across the bottom and throughout the sides, the sides of thecorrugations in the bottom being provided with outstruc-k claws disposedinwardly of the yplane of the outer crowns of the cor-y rugations.

18. A form for concrete comprising a single sheet of metal bent to forma bottom and sides and having a continuous series of corrugationsextending across the bottom and throughout the sides; the sides of thecorrugations in the bottom being provided with outstruck claws disposedinwardly of the plane of the outer crowns of the corrugations, the clawsin the sides of the corrugations being staggered.

Signed at Chicago7 Illinois, this 10th day FRANCIS M. BARTON.

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